I have a '01 525 that won't start -- the battery is fine -- cranks / turns over very strong. It just wont get all the way there.

Any ideas or links to follow for things to try?

After 3 years in California the car just finished its first boston winter .. perhpas that is a factor...

Thanks for you help.

Doug

Hi, Doug.
My car quit on me after running great just an hour previously. It turned out the fuse going to the fuel pump was bad. I even looked at the fuse, and it looked fine.
Swap out the fuel pump fuse with one of the others that you know is good. Can't hurt, doesn't cost anything, and only takes a moment.
Flunky

you want to know why it doesnt run its a BMW

check for spark and fuel pressure

oh yea, NOt at the same time mmk?